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Leases - Supplemental Balance Sheet Information (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Operating lease right-of-use asset $ 9.5 $ 11.0
Other current liabilities 2.9 2.3
Other non-current liabilities 6.7 8.9
Operating lease liability $ 9.6 $ 11.2
Weighted Average Remaining Lease Term (Years) 21 years 10 months 24 days 17 years 1 month 6 days
Weighted Average Discount Rate 4.43% 4.46%
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] us-gaap:OtherLiabilitiesCurrent us-gaap:OtherLiabilitiesCurrent
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] us-gaap:OtherLiabilitiesNoncurrent us-gaap:OtherLiabilitiesNoncurrent